1 files changed, 135 insertions, 0 deletions
diff --git a/core/src/main/jdk1.1/org/spongycastle/crypto/tls/AbstractTlsContext.java b/core/src/main/jdk1.1/org/spongycastle/crypto/tls/AbstractTlsContext.java
new file mode 100644
index 00000000..cd6f7a8c
--- /dev/null
+++ b/core/src/main/jdk1.1/org/spongycastle/crypto/tls/AbstractTlsContext.java
@@ -0,0 +1,135 @@
+package org.spongycastle.crypto.tls;
+
+import java.security.SecureRandom;
+
+import org.spongycastle.crypto.prng.DigestRandomGenerator;
+import org.spongycastle.crypto.prng.RandomGenerator;
+import org.spongycastle.util.Times;
+
+abstract class AbstractTlsContext
+    implements TlsContext
+{
+    private static long counter = Times.nanoTime();
+
+    private synchronized static long nextCounterValue()
+    {
+        return ++counter;
+    }
+
+    private RandomGenerator nonceRandom;
+    private SecureRandom secureRandom;
+    private SecurityParameters securityParameters;
+
+    private ProtocolVersion clientVersion = null;
+    private ProtocolVersion serverVersion = null;
+    private TlsSession session = null;
+    private Object userObject = null;
+
+    AbstractTlsContext(SecureRandom secureRandom, SecurityParameters securityParameters)
+    {
+        secureRandom.setSeed(nextCounterValue());
+        secureRandom.setSeed(Times.nanoTime());
+
+        this.nonceRandom = new DigestRandomGenerator(TlsUtils.createHash(HashAlgorithm.sha256));
+        byte[] nonceSeed = new byte[32];
+        secureRandom.nextBytes(nonceSeed);
+        this.nonceRandom.addSeedMaterial(nonceSeed);
+
+        this.secureRandom = secureRandom;
+        this.securityParameters = securityParameters;
+    }
+
+    public RandomGenerator getNonceRandomGenerator()
+    {
+        return nonceRandom;
+    }
+
+    public SecureRandom getSecureRandom()
+    {
+        return secureRandom;
+    }
+
+    public SecurityParameters getSecurityParameters()
+    {
+        return securityParameters;
+    }
+
+    public ProtocolVersion getClientVersion()
+    {
+        return clientVersion;
+    }
+
+    void setClientVersion(ProtocolVersion clientVersion)
+    {
+        this.clientVersion = clientVersion;
+    }
+
+    public ProtocolVersion getServerVersion()
+    {
+        return serverVersion;
+    }
+
+    void setServerVersion(ProtocolVersion serverVersion)
+    {
+        this.serverVersion = serverVersion;
+    }
+
+    public TlsSession getResumableSession()
+    {
+        return session;
+    }
+
+    void setResumableSession(TlsSession session)
+    {
+        this.session = session;
+    }
+
+    public Object getUserObject()
+    {
+        return userObject;
+    }
+
+    public void setUserObject(Object userObject)
+    {
+        this.userObject = userObject;
+    }
+
+    public byte[] exportKeyingMaterial(String asciiLabel, byte[] context_value, int length)
+    {
+        if (context_value != null && !TlsUtils.isValidUint16(context_value.length))
+        {
+            throw new IllegalArgumentException("'context_value' must have length less than 2^16 (or be null)");
+        }
+
+        SecurityParameters sp = getSecurityParameters();
+        byte[] cr = sp.getClientRandom(), sr = sp.getServerRandom();
+
+        int seedLength = cr.length + sr.length;
+        if (context_value != null)
+        {
+            seedLength += (2 + context_value.length);
+        }
+
+        byte[] seed = new byte[seedLength];
+        int seedPos = 0;
+
+        System.arraycopy(cr, 0, seed, seedPos, cr.length);
+        seedPos += cr.length;
+        System.arraycopy(sr, 0, seed, seedPos, sr.length);
+        seedPos += sr.length;
+        if (context_value != null)
+        {
+            TlsUtils.writeUint16(context_value.length, seed, seedPos);
+            seedPos += 2;
+            System.arraycopy(context_value, 0, seed, seedPos, context_value.length);
+            seedPos += context_value.length;
+        }
+
+        if (seedPos != seedLength)
+        {
+            throw new IllegalStateException("error in calculation of seed for export");
+        }
+
+        return TlsUtils.PRF(this, sp.getMasterSecret(), asciiLabel, seed, length);
+    }
+}